961515239 has 2 divisors, whose sum is σ = 961515240. Its totient is φ = 961515238.

The previous prime is 961515227. The next prime is 961515277. The reversal of 961515239 is 932515169.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961515239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 961515196 and 961515205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961515209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480757619 + 480757620.

It is an arithmetic number, because the mean of its divisors is an integer number (480757620).

Almost surely, 2^961515239 is an apocalyptic number.

961515239 is a deficient number, since it is larger than the sum of its proper divisors (1).

961515239 is an equidigital number, since it uses as much as digits as its factorization.

961515239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72900, while the sum is 41.

The square root of 961515239 is about 31008.3091928599. The cubic root of 961515239 is about 987.0035708938.

The spelling of 961515239 in words is "nine hundred sixty-one million, five hundred fifteen thousand, two hundred thirty-nine".